400211421 has 8 divisors (see below), whose sum is σ = 561700320. Its totient is φ = 252765072.

The previous prime is 400211411. The next prime is 400211429. The reversal of 400211421 is 124112004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400211421 - 2¹¹ = 400209373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400211421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400211429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3510570 + ... + 3510683.

It is an arithmetic number, because the mean of its divisors is an integer number (70212540).

Almost surely, 2^400211421 is an apocalyptic number.

It is an amenable number.

400211421 is a deficient number, since it is larger than the sum of its proper divisors (161488899).

400211421 is a wasteful number, since it uses less digits than its factorization.

400211421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7021275.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 400211421 is about 20005.2848267652. The cubic root of 400211421 is about 736.9360904676.

Adding to 400211421 its reverse (124112004), we get a palindrome (524323425).

The spelling of 400211421 in words is "four hundred million, two hundred eleven thousand, four hundred twenty-one".